Fisher Space Bullet Pens
Writes underwater
Writes upside down and at any angle
Writes twice as long as other roller ball pens
The most dependable, reliable, and versatile pen in the world
The Fisher Space pen ink cartridge is the key to its superiority.
It is pressurized with 35 pounds per square inch of gas.
This pressure pushes on the sliding float ball allowing our unique thixotropic ink to flow smoothly in the tungsten carbide ball.